Lundström A, Forsberg C M, Westergren H, Lundström F
Karolinska Institutet, Forskningscentrum, Huddinge, Sweden.
Eur J Orthod. 1991 Feb;13(1):59-64. doi: 10.1093/ejo/13.1.59.
Using tracings of facial profiles, four observers made two independent, subjective estimations of natural head posture (NHP) in 28 adults. The results of these estimations were compared with recordings of NHP obtained through photographic registration of the same subjects. Only minor average differences (between 0 and 1.4 degrees) were found between the two methods. The differences between estimated and registered head posture found at the first and second observation, were positively correlated for both intra- and inter-observer registrations (r = 0.59-0.80 and r = 0.50-0.71, respectively). The inclination of the basion-nasion line was measured; first, in relation to the photographically registered horizontal line and, secondly, in relation to the horizontal line derived from the estimation of NHP. Both methods of measurement gave similar mean values and standard deviations. A panel comprising 18 persons was asked to compare the head orientations of two subjects in whom a marked difference between estimated and registered NHP had been recorded. In the majority of these comparisons, the profiles orientated according to the subjective estimation were judged to have a more 'natural posture' than those orientated by the photographic method. This unexpected finding is discussed.
四位观察者利用面部轮廓描图，对28名成年人的自然头部姿势（NHP）进行了两次独立的主观估计。将这些估计结果与通过对同一受试者进行摄影记录获得的NHP记录进行了比较。两种方法之间仅发现了微小的平均差异（在0至1.4度之间）。在第一次和第二次观察中发现的估计头部姿势与记录头部姿势之间的差异，对于观察者内和观察者间的记录均呈正相关（分别为r = 0.59 - 0.80和r = 0.50 - 0.71）。测量了鼻根 - 鼻前棘线的倾斜度；首先，相对于摄影记录的水平线，其次，相对于从NHP估计得出的水平线。两种测量方法给出了相似的平均值和标准差。一个由18人组成的小组被要求比较两名受试者的头部方向，在这两名受试者中，估计的NHP与记录的NHP之间存在明显差异。在大多数这些比较中，根据主观估计确定方向的轮廓被判定比通过摄影方法确定方向的轮廓具有更“自然的姿势”。对这一意外发现进行了讨论。
